9.2 Expenses Bank Account number 0's at pay cycle stage

Hi, we have been using 9.2 Expenses for several years and only just had two instances of this issue recently.  The Bank Account number is all 0's causing the payment to fail for that particular employee.  The employee has successfully been paid into the nominated Expenses Bank Account in the past. The Bank Account number has not changed and can still be viewed in Update Employee Profile, Bank Accounts page

Any advice most welcome.

Regards

Denise.